Which of the following is permitted when using an unclassified laptop within a collateral classified space?

Using a government-issued wireless headset with a microphone is permitted when using an unclassified laptop within a collateral classified space because it complies with security protocols while allowing for communication. Government-issued equipment is designed to meet specific security standards and is typically trusted to operate safely in environments with classified information. This type of headset can prevent the potential interception of sensitive conversations because it maintains a controlled communication channel that aligns with the Navy's emphasis on safeguarding classified and sensitive information.

The other options involve either personal equipment or configurations that do not meet the established protocols for security in classified environments. These factors contribute to an elevated risk of data leakage or unauthorized access, which is why they are not allowed. By using a government-issued headset, the user can minimize security risks while still effectively communicating.